using System;
using System.Threading.Tasks;
using DSharpPlus.Entities;
using DSharpPlus.Exceptions;
using DSharpPlus.SlashCommands;
using DSharpPlus.SlashCommands.Attributes;

namespace Breadcraft.Commands;

public class AssignCommand : ApplicationCommandModule
{
	[SlashRequireGuild]
	[SlashCommand("assign", "Assigns a staff member to this ticket.")]
	public async Task OnExecute(InteractionContext command, [Option("User", "(Optional) User to assign to this ticket.")] DiscordUser user = null)
	{
		DiscordMember member = null;
		try
		{
			member = user == null ? command.Member : await command.Guild.GetMemberAsync(user.Id);

			if (member == null)
			{
				await command.CreateResponseAsync(new DiscordEmbedBuilder
				{
					Color = DiscordColor.Red,
					Description = "Could not find that user in this server."
				}, true);
				return;
			}
		}
		catch (Exception)
		{
			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Red,
				Description = "Could not find that user in this server."
			}, true);
			return;
		}

		// Check if ticket exists in the database
		if (!Database.TryGetOpenTicket(command.Channel.Id, out Database.Ticket ticket))
		{
			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Red,
				Description = "This channel is not a ticket."
			}, true);
			return;
		}

		if (!Database.IsStaff(member.Id))
		{
			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Red,
				Description = "Error: User is not registered as staff."
			}, true);
			return;
		}

		if (!Database.AssignStaff(ticket, member.Id))
		{
			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Red,
				Description = "Error: Failed to assign " + member.Mention + " to ticket."
			}, true);
			return;
		}

		await command.CreateResponseAsync(new DiscordEmbedBuilder
		{
			Color = DiscordColor.Green,
			Description = "Assigned " + member.Mention + " to ticket."
		});

		if (Config.assignmentNotifications)
		{
			try
			{
				await member.SendMessageAsync(new DiscordEmbedBuilder
				{
					Color = DiscordColor.Green,
					Description = "You have been assigned to a support ticket: " + command.Channel.Mention
				});
			}
			catch (UnauthorizedException) { }
		}

		// Log it if the log channel exists
		DiscordChannel logChannel = command.Guild.GetChannel(Config.logChannel);
		if (logChannel != null)
		{
			await logChannel.SendMessageAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Green,
				Description = member.Mention + " was assigned to " + command.Channel.Mention + " by " + command.Member.Mention + "."
			});
		}
	}
}